Hi Cathy, i looked everywhere but came up with ziltch!! so i am begining to think that maybe it was made on a studio day like Adam has and a visitor made it, so as an experiment for us all i am going to try "da da dahhh!!" the candle and soot trick!! i will let you know what happens

Morning all, well here is the result and no CLUNK! although not very clear it did work to a point, as the base is rather concave the cellotape creased and missed part of the lettering, i think it would have worked better on a flat base.Holding the candle at an angle the flame hardly had to touch the glass, only the smoke (soot) from the candle touched the glass.http://glassgallery.yobunny.org.uk/displayimage.php?pos=-8023

Sorry about the poor photo, but you should get an idea of how it work's.